The engine I'm building will be way under the 16" vacuum rule so I'll have too run in a different class and I'm hearing about some guys pulling vacuum off there carb spacer plates by drilling a hole a inserting a fitting then turning it downwards and cutting it at a angle so that the air coming by would pull enough vacuum too make them legal for the class has anyone ever heard of this? Because somethings going on here these motors are chopping real hard and still pulls just enough to pass.